As you undoubtedly realize, both the 8500 and 6360 use SCSI optical drives. The real problem with upgrading a Performa 6360's CD-ROM drive with a third-party optical drive is caused by the manner in which it's connected. Those Performas utilize a rear-mounted, slot connector for the optical drive's connections, that's part of the wiring harness coming off the motherboard's main connector slot. There are no individual cables for power, data, and audio. To make the connections, the drive's power & data ports use a single, plug-in adapter, as does the audio port. When replacing drives, these adapters must be carefully removed from the old drive and installed on the new drive. When the drive is slid fully into place, these adapters engage the rear slot for their respective connections. Because there is no standardized spacing between the power, data, and audio connections on optical drives, the adapter that was designed for the Apple OEM CD-ROM drive won't necessarily fit another brand. The adapters must align both horizontally and vertically, with the rear slot's connection points. If you want to upgrade the 6360's 8x CD-ROM drive with a faster Apple/Matshita drive (12x or 24x), that's a direct swap. If you want to install a third-party CD-R/RW drive that doesn't match Apple's hardware spacing, you'll run into problems. As for accessing the 6360's optical drive, you should remove the motherboard's rear (plastic) I/O faceplate, so that the unit can be stood up on end, without breaking off the release tabs. While upright, look under the overhanging edge of the main front bezel, and you'll see (2) slots, into which a large, flat-blade screwdriver must be inserted to pry up on the release tabs. Alternate from side-to-side, as you pry up, so that the bezel moves outward equally. Once it's popped loose, swing it upward to remove it. The CD-ROM drive is removed by lifting up on its sled's release tab and pulling straight out. Because it's plugged into the connector slot in the rear, you'll have to use enough force to initially free it. The adapters on the rear should be gently removed, because the power/data adapter tends to break easily between the two connectors.